22138169 has 4 divisors (see below), whose sum is σ = 22334196. Its totient is φ = 21942144.

The previous prime is 22138159. The next prime is 22138187. The reversal of 22138169 is 96183122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2601769 + 19536400 = 1613^2 + 4420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22138169 is a prime.

It is a super-2 number, since 2×22138169² = 980197053345122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22138139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97844 + ... + 98069.

It is an arithmetic number, because the mean of its divisors is an integer number (5583549).

Almost surely, 2^22138169 is an apocalyptic number.

It is an amenable number.

22138169 is a deficient number, since it is larger than the sum of its proper divisors (196027).

22138169 is a wasteful number, since it uses less digits than its factorization.

22138169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196026.

The product of its digits is 5184, while the sum is 32.

The square root of 22138169 is about 4705.1215712243. The cubic root of 22138169 is about 280.7893077492.

The spelling of 22138169 in words is "twenty-two million, one hundred thirty-eight thousand, one hundred sixty-nine".